package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传过来的明文密码进行md5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equalsIgnoreCase(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /***
     * 新增员工的业务方法
     * @param employeeDTO
     */
    public void save(EmployeeDTO employeeDTO) {

        System.out.println("当前线程的id:" + Thread.currentThread().getId());

        Employee employee = new Employee();

        //因为在EmployeeDTO和Employee中有的属性名类型一致就进行对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置Employee里面其他的属性
        //设置账号的状态,默认正常状态,1表示正常 0表示声锁定
        employee.setStatus(StatusConstant.ENABLE);

        //新增员工,设置密码,设置默认密码使用定好的常量密码,要进行加密比对,在变成Bytes数组
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置当前记录的创建时间和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人的id和修改人id
        //先固定写死一个值,到后面在更换

        /***
         *  BaseContext.getCurrentId()这个id是最开始从
         *  JwtTokenAdminInterceptor类拦截器中存进去
         *  再到这个地方再取出来
         */
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    /***
     *分页查询
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        //select * from employee limit 0,10  进行拼接就直接调用下面这个方法
        //调用方法,开始分页-页码-每页的记录数
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        //查询方法,吧employeePageQueryDTO作为参数传到方法里面去
        //返回值是固定的所以要 (包)Page(泛型)<(实体类)Employee>
      Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);

      long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }

    /***
     * 启用禁用员工账号
     */
    public void startOrStop(Integer status, Long id) {
        //动态sql语句
        //update employee set status = ? where id = ?
        //用传统的方法用实体对象
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //再把实体对象传进去
        employeeMapper.update(employee);
    }

    /***
     * 根据id查询员工信息
     */
    @Override
    public Employee getById(Long id) {
     Employee employee=employeeMapper.getById(id);
     //还要传密码到前端,因为在后端密码已经进行加密了所以传*给前端
        employee.setPassword("****");
        return employee;
    }


    /***
     * 编辑员工信息
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //创建一个新的空
        Employee employee = new Employee();
        //再用拷贝吧employeeDTO里面的值拷贝给新空
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置修改完信息的当前时间
//        employee.setUpdateTime(LocalDateTime.now());
//        //设置修改完的当前id
//        employee.setUpdateUser(BaseContext.getCurrentId());
        //调用update动态然后吧对象再传进去修改数据表
        employeeMapper.update(employee);
    }


}
